METHOD AND DEVICE FOR TREATING EFFLUENTS, IN PARTICULAR EFFLUENTS FROM A CAREENING AREA

摘要

The invention relates to a method and device for treating effluents, in particular effluents from a careening area, a method for pre-treating sludge received from the effluent-treating unit of the inventive device and to careening stations provided with said devices. The inventive treating method comprises a first stage consisting in recovering and treating the effluents in a treatment unit (102) and a second stage consisting in pre-treating the sludge received therefrom. The treating process carried out in said unit consists in a) transferring the sludge to a tank (113), b) dehydrating said sludge by natural evaporation, c) restarting the step a) if the sludge layer is sufficiently thin for carrying out a correct dehydration, d) removing water from the bottom part of the tank if the sludge layer is too thick and in e) transferring the content of the tank to a special-purpose vehicle and reusing said tank.